Rooms and suites

Deluxe and Siam rooms are 42 square meters with marble bathrooms, a separate tub and rain shower, and a choice of classic Thai style with hand-painted murals or a more contemporary look. Siam rooms are on high floors. Kasara rooms and every suite add the Kasara Executive Lounge and its privileges. Suites start at 72 square meters, and the Garden Pool Suite has its own plunge pool. The hotel also offers a Two Bedroom Jim Thompson Explorer Suite and a Garden Pool Villa, and sells an Anantara and Jim Thompson resort-wear collection.

Spa, fitness and families

Anantara Spa's signature Soul of Siam massage draws on healing traditions from Thailand, Myanmar, Laos and China, and the spa also offers Himalayan salt-stone therapy and the VIVID IV drip bar. The Technogym-equipped Health Club has a squash court, a yoga studio, and separate steam rooms and whirlpools for men and women, with private Muay Thai, Pilates and Hyrox sessions on request. For families there is a Kids' Club, babysitting and a children's boxing class.

Meetings and weddings

The Grand Ballroom, flexible meeting rooms and 17 breakout rooms were all renovated in 2026, and suite and villa guests have access to the Kasara Executive Lounge for business stays.

Recognition

The MICHELIN Guide includes Anantara Siam Bangkok Hotel in its selection of Bangkok hotels.

Restaurants and bars

Most of the restaurants open for lunch and dinner, and each takes bookings on its own phone line or through the hotel.

The Lobby serves all-day dining under the frescoed ceiling and is the hotel's afternoon tea room, with Mariage Frères teas. On Sundays the hotel hosts the Grand Siam Sunday Brunch.

Biscotti serves Italian food and wine. Madison Steak Avenue, the New York-style steakhouse, has reopened with cuts including Snake River Farms beef. Shintaro serves traditional Japanese food with a twist, and Spice Market cooks Thai dishes with traditional ingredients.

Guilty Bangkok is a South American drinking-and-dining den known for welcome shots. Aqua is the garden bar, open until after midnight, and one of the hotel's designated smoking areas.

Mocha & Muffins handles coffee, bakery and pastries, and The Garden Terrace serves drinks and light meals beside the pool. In-room dining runs 24 hours, and the hotel arranges floating breakfasts and private Dining by Design dinners with three days' notice.

Manohra Cruises is Anantara's dinner cruise on a restored antique rice barge on the Chao Phraya, with a Thai set menu and two sittings each evening. Spice Spoons is the hotel's Thai cooking class, bookable three days ahead.

Sources: Anantara Siam Bangkok Hotel, rooms, restaurants, spa, leisure, getting here, MICHELIN Guide. Checked September 25, 2026.